Attachment for elevator-doors



(No Model.)

B. P. WALKER. ATTAOHMENT FOR ELEVATOR DOORS.

Patented Feb. 8, 1887.

DIVENTOR:

BY M

.- ATTORNEYS;

N PETERS. Fhoto-L'rlhognphen wanin -mm D. C.

UNIT D STATES PATENT Orrica.

EDWARD PERRY WALKER, OF KANSAS CITY, MISSOURI.

ATTACH M ENT FOR ELEVATO R -DOORS.

SPECIFICATION forming part of Letters Patent No. 357,430, dated February8, 1887.

Application filed July 7, i886. Serial No. 207,360. (No model.)

T at whom, it may concern:

Be it known that I, EDWARD PERRY WALKER, of Kansas City, in the countyof Jackson and State of Missouri, have invented a new and usefulImprovement in Attachments for Elevator-Doors, of which the following isa specification.

My invention is in the nature of an attachment for the top and bottomdoors of an ele- Vator-shaft, the said attachment being designed toeffect by the movement of the elevator-car the automatic operation ofthe doors of the shafts, so that the elevator-man is relieved of thisduty. 1 v

\ The invention consists in the peculiar construction and arrangement ofparts, which I- will now proceed to describe.

In the accompanying drawings, Figure 1 is a front elevation of anelevator-door, showing my improvements applied, the door being shownopen in full lines and closed in dotted lines. Fig. 2 is a perspectiveview of the slidebar and guide. f

A represents the sliding door of the elevator-shaft, which door ismounted upon rollersthat travel upon guide-rails, as usual. To one sideof the door is attached a rope, 0., that passes around a pulley, b,onthe elevator-shaft, and over another one, b, above, then passes down toand connects with a slide-bar, B, in a Vertical guide, 0, whichslide-bar has a foot, B, that projects horizontally into the path of theelevator-car, so that as the car nears the end of its descent it strikessaid foot and pulls down the slide, and the movement of which latterpulls back the door A of the elevatorshaft from its position in front ofthe opening in the same.

To restore the door to its position or close itagain, a weight, G, isarranged upon the opposite side of the door-opening in theelevator-shaft, and is connected to two cords, c c, which pass, the one,a, over a pulley, d, and connects with the top of the door, whiletheother cord, 0', passes around the two pulleys d d and connects with thebottom of the door. It will thus be seen that the gravity of weight Gcloses the door as soon as the car passes off of the foot B of theslide, the power of the weight being distributed by the two cords c andc to the top and bottom of the door, so as to prevent it from gripping,and cause it to move smoothly, certainly, and sensitively.

It will be seen from the foregoing description that the door of theelevator shaft is made entirely automatic inits working, being opened bythe descent of the car upon the foot B and closed again by the weight assoon as the car rises, or passes off of the foot B.

As so far described the attachment is applicable only to the bottom doorof the elevator-shaft; but it is obvious that the same arrangement isapplicable to the top door by simplyreversing the position of the slideand foot B B and its attachment, and placing the foot so as to be struckby the top of the car in ascending.

I am aware that the door of an elevator has been-worked by mechanism inthe car and a weight and pulley, and I do not claim this, broadly. 5

Having thus described my invention, what I claim as new is- A 1. Thecombination, with the horizontallyvsliding door in an elevator-shaft, ofthe cord or rope a, the guide-pulleys b b, the slide B, with foot Bprojecting into the path of the elevator, the weight G, the pulleys d (1(P, and the cords c 0, connected at one end to the weight and passingaround the pulleys, and connected, respectively, to the top and bottomof the door, substantially as shown and described.

2. The combination, with the sliding elevator-door, of the weight G, thepulleys d d (1 and the cords cc, connected at one end to the weight andpassing around the pulleys, and

connected, respectively, to the top and bottom of the door to distributethe power of the .weight thereto and prevent gripping, as described.

EDWVARD PERRY \VALKER.

Witnesses:

CHARLES KIROHENBAUER, ERNEST KIROHENBAUER.

